Door check and closer.



, PATENTED JAN. 23, 1906- W. K. HENRY. DOOR CHECK AND CLOSER.APPLICATION FILED MAYG, 1905.

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UNITED STATES PATENT osmos- WILLIAM K. HENRY, OF NEW BRITAIN,CONNECTICUT. ASSIGNOR TO P. & F. CORBIN, OF NEW BRITAIN, CONNECTICUT, ACORPORATION OF CONNECTICUT.

DOOR CHECK AND CLOSER- Specification of Letters Patent.

Patented J an. 23, 1906.

Application filed May 6. 1905. Serial No- 269,081-

To all whom it may concern:

. Be it known that I, WILLIAM K. HENRY, a citizen of the United States,residing at New Britain, Hartford county, Connecticut, have inventedcertain new and useful Im provements in Door Checks and Closers, ofwhich the following is a full, clear, and exact description.

My invention relates to improvements in door-checks, and the sarneis ofparticular advantage when employed in connection with a door-closer, forexample, such as set forth in my application, Serial No. 259,082, filedMay 6, 1905,

The main object of my invention is to provide an eflective liquiddoor-check which may be easily assembled and which is of suchconstruction that it may be used without changing the internal mechanismupon either a right or a left hand door.

In the accompanying drawings, Figure 1 is a longitudinal section of thedoor-check and a part of the closer, the balance of the latter beingshown in elevation. Fig. 2 is a crosssection of the check-casing withone of the pistons removed. In this view a cross-section of the closermechanism is partly shown, while the balance is shown in elevation. Fig.3 is a view of the lower part of the spindle with the crank thereon.Fig. 4 is a plan View of one of the connecting-rods; Fig. 5 is a planView of another connecting-rod. Fig. 6 is a plan view of thepacking-gland. Fig. 7 is a plan view of the packing. Fig. 8 is a planView of the crank-supporting nut.

1 designates a cylinder constituting the liq- 2 3 designate pistonsarranged therein.

4=designates the spindle having suitable bearings. The lower part of thespindle is I furnished with a crank portion furnishing the two oppositecranks 5 and 6, arranged one above the other so as to receive theconnecting-rods 7 8, respectively. Both cranks 5 6 are made integral,and the construction is such that both connecting-rods may be appliedthereto quickly and easily. This is accomplished by constructing thecrank-pin of crank 5 of considerably greater diameter than the crank 6and its crank-pin, so that the enlarged strap portion 7 a of theconnecting-rod 7 may be easily passed over the-crank 6 and the adjacentsupport and then slipped into place on the pin of crank 5. The diameterof the strap 7 a is large enough to slip freely over any portion of thelower crank and crank-pin, and the assembling of the cranks and thestrap ends of the connecting-rods is eifected before thespindle-bearings are attached to the case, at which time if the heads ofthe cylinder 1 are assembled the various parts may be turned freely soas to effect said connection.

9 designates a cotter-pin or other suitable I device which maybe securedto the crank 5 after the connecting-rod 7 is in place to prevent it fromdropping down or tilting out of alinement.

10 1O designate the wrist-pins.

11 12 designate check-valves for the pistons 2 3, respectively.

Around the cylinder from end to end is a by-pass 13. 14 designates acommunicating passage from the space between the pistons to said by-pass13. (See Fig. 2.) 15 designates a valve whereby the size of thiscommunicating passage 14: may be varied at will. The pistons 2 3 areshown in their normal inactive position. When the door is opened, thespindle 4 is turned, and the pistons 2 3 are moved away from each otherand toward the opposite ends of the cylinder 1. During this movement theliquid freely passes the check-valves 11 12. When, however, the doorstarts to close, the liquid between the pistons .is prevented fromflowing through the passages inthe pistons, since the check-valves 1 112 automatically close said passages. It is thennecessary for the iiquidto flow through the communicating passage 14: into the bypass 13 andthence to the cylinder ends. By this means the door may be openedfreely, but is checked as it closes.

I need not describe the closing mechanlsm in detail, since that is setforth in my abovereferred-to application. Suflice it to say that 16 is acasing affording a spring-chamber within the same.

17 designates the spring, the same belng suitably connected to thespindle 4:. The spring-chamber is closed off from the liquidchamber by apartition 18, through which the spindle 4 passes. Between the walls ofthe partition 18 and the spindle are packing-washers 19 19, of suitablematerial, held in place by a gland 20, screw-threaded into a sleevelikeextension on said partition 18. Underneath the packing-washers 19 may bea spring 21. The packing-washers 19 are caused to snugly fit against theside walls by the pressure of the spring 21 and the restraininginfluence of the gland 20, and thus prevent the leakage of oil.

22 designates a nut screw-threaded on the spindle 4 and arranged to drawit up into proper position preparatory to assembling the parts locatedabove the check.

From the foregoing it will be seen that the cranks 5 6 being out of linewill receive theconnecting-rods in such manner that they will notinterfere in crossing the center, no matter which way the spindle 4- isturned. The connecting-rods may be made integrally, -it beingunnecessary to open the ring 7* at the end of the upper rod 7 when theparts are assembled.- It is also possible to assemble these partswithoutdismembering the crank. With a construction other than that setforth herein it would be impossible to connect the upper ticularadvantage when the check is origi-' nally assembled. The advantage ofemploying a relatively small opening for the admission .or removal ofthe liquid is that the danger of leakage is substantially reduced.Furthermore, it permits the caps 23 24 to be secured to the cylinderends with a suitable cement or other packing material, which renders thesame absolutely-liquid-tight, and it is, neces sary in introducingor{-removing the liquid from the cylinder to break thesejoints. Theadmission-port closed by the .plug 25 is so small relatively to the sizeof the cap that it is a very easy matter to effectively pack the, sameand render it liquid-tight by the use of a small packingwasher.

What I claim is 1. In a door-check, acylinder, aspindle having twocranks at its lower end, said cranks being arranged oppositely and indifierent planes, thelowermost crank being free-ended, the diameter ofthe crank-pin nearest the spindle being substantially greater than thediameter of the other crank-pin and crank, pistons, connecting-rodsbetween said pistons and said crank-pins, the strap end of .one'of saidconnecting rods being of suficient diameter to freely pass over one ofsaid crank-pins and crank-arms to engage the othercrank-pin.

2. In combination, a cylinder, two pistons therein. a spindle having twocranks, said cranks being arranged oppositely and in different planes,connecting-rods having strap ends, said rods adapted to said cranks andarranged between said cranks and said pistons, the strap-bearings of thecrank-pins of said cranks corresponding respectively to said straps, oneOfsaid connecting-rod straps be.- ing 'ofgreater diameter than the otherto slip over one of said crank-pins and cranks and properly engage theothencrank, the closer mechanism including springchamber and spring anda liquid tight partition between said cylinder and said spring-chamber.

3. In a door-check, acylinder, two pistons,

a spindle having two cranks and crank-pin, oppositely arranged and indifierent-planes,

the diameter ofthe upper crank-pin being greater than the diameter. ofthe other pin and crank, and connecting-rods having strap ends betweensaid rank-pins and said pistons, the strap'en'd of one of said rodsbeing sufficiently-large to slip over one of said cranks and crank-pinand'fit the other pin.

- WILLIAM K. HENRY. Witnesses: I

R. C. MITCHELL, RoBT. S. ALLYN.

